Elevator.



J. T. CLARK.

ELEVATOR. v

v APPLICATION TILED AUG. 9, 1910.

Patented Apr. 16,1912.

WITNESSES IAVEN TOR ATTORNEYS UNITED [lid-. 14 whom it mdy concern; I

T 'Be v it known that I, JoHN T. CLARK, a citizen of the United States, residing in the city of New, York, borough of Manhattan, 'county and State of New York, have invented a certain-new and useful Elevator,

which the following is a specification.

j Thiseinfvent-ion is an elevator, the same being adapted, more particularly, for bandling-freight, although it may be employed for other purposes.

The apparatus embodies a car or cage .lpositionedfor engagement with a vertical guideway. by which said car is precluded 15 from swaying during the operations of raisingor lowering the .car with or without its load, means for controlling the rise and fall ofthe car, and a counterweight operating to automatically elevate the car when a load isdischarged therefrom, said counterweight being retained by a .verticalguideway for movement in a predetermined path, whereby I the car and theweight may be arranged in close or compact relationship without the one interfering with the operation of the other. I Other f atures of the invention, and the v,iadvantages ,\thereof, will appear in the courseofthe annexed detailed description. In the accompanying drawings Lhave illustrated .apr'actical embodiment of the inventio'njbut the construction shown therein I I is to [be understood as illustrative, only, ,of said invention, and not as defining the limits 5 thereof. I V p r Figure 1. is a side elevation of an elevator constructed in accordance with the invention, a loadedcar or cage being shown in a raised position. I Fig. 2 1s an elevation look- 401 at the elevator toward the right in V The'car or cage, A, maybe of any suitable construction known to those skilled in the art. It is shown as consisting of a platform and a frame extending upwardly from said platform. Said car is limited to movement in a vertical direction by a guideway herein shown as consisting of the uprights, B, with.

j which engage guides, a, of the car.

C designates a' 'hor izontal shaft positioned lgoverthe guideway, said shaft being mounted'jfor' free rotation in bearings, 0, provided at the u'pper end'of said guideway. Secured "rigidly to this shaft are winding drums, D, 1 BSfbrake-drums, E, and a'counterweight drum,

whereby-e11 of said drums rotate with STATES PATENT JOHN '11 crank, oruvnw Yonie-ln. 'Y.

union.

ELEVATOR.

Specification of Letters Patent. 1 lPatented Apf jlfi, Application filed August 9, 1.910. SrialNo. 576,352. g v r I isaid shaft. v The winding drums spaced at suitable intervals on the shaft, and upon said' drums are coiled the cables, G, by which the car is adapted to be raised and 69 lowered when shaft C- rotates in its hearings. in one direction or the other. Thecables are attached bysuitable means to the car, at the upper part of the upstanding-frame thereon, and if desired, suitable guides, indicated 5 by dotted lines at g in Fig. 2 maybe employed for properly directing the cables upon the winding drums. Cooperating with brakedrums,,E, are brake-bands, H, each of which loosely encircles one of said drums. 70 The brake-bands are secured firmly, at one end thereof, to a cross-rail, g, .at the top of the guideway, but the other ends of said brake-bands are attached to cranks, 2', of a rock-shaft, I. Saidrock-shaft is positioned horizontally at one side-of shaft, C, and the drums thereon, and it is supported 'in bearings, 2", fixed to a part of the framework. The brake-bands are composed of spring metal so that they are free normally from 30 engagement with the brake-drums, but when it is desired to apply the brake mechanism and. arrest shaft C, shaft I is rocked in its bearings by a suitable manually operated element, such as the lever-arm I, the same 35 being secured rigidly to the rock-shaft and positioned within convenient reach of an operator. p

The car is adapted to be elevated automatically when 'a'load is discharged therefrom by the operation of counterweight mechanism, such as shown in the drawings.

A counterweight, J, is slidablyfitted to appropriate guides, '1', which are fixed adjacent and parallel to the guideway B for the car.-

The counterweight is shown as consisting .of a suitable frame and a series of weight elements positioned within said frame so as to be removable therefrom, thus -making provision for securing a variation in the weight of the counterweight. To the upper part of said counterweight is attached a cable, J which extends upwardly to the drum, F, so that the cable may be coiled on said drum) The counterweight moves in ."an'upward direction when the car travels downwardly, and to secure this operation the cable J is coiled on drum F in an opposite direction to that in which cables G are coiled upon winding drums, D.

'The car or cage is provided with a movable bottom A, said bottom being hingedly or pivotally supported atone end and pro.- vided at 1ts other end with a depending leg, A When the car reaches the bottom of the guideway, or when it is arrested at; a deslred polnt in its downward movement, the depending .leg comes into contact'with the bottom of the shaft-or hatchway, whereby the bottom A? of the "car is raised so that the bottom assumes an inclined position to I position the horizontal plane of the platform or base frame of the car, the effect of which is to automatically discharge the load from the car.

To revent the barrels or casks from rolling 0 a floor, or other surface, into the elevator shaft or hatchway, I employ a stop bar, L, shown more clearly in Fig. 2; Said stop bar is 'ivoted at one end, by a pin Z, to a part 0 the framework, and the other end of said bar is engaged with a keeper, Z, secured to the framework, whereby the free or unattached end of the bar may be raised to a height suflicient for thebarrels or casks to be ro led under the bar in loading the car.

The car is provided with a stop-bar, atthe end thereof'distant from that side of the shaft orhatchway to which 'stop bar, L, isapplied. .'Stop bar, O, is pivoted to a part of car A hy a pm or bolt, 0, and its other or unattached end is slidably fitted in a keeper, 0", secured to the car. Stop bar 0 is adapted to be lifted automatically when the car reaches the bottom of the hatchway or shaft by aleg, 0", which is pivotally or loosely connected to the free'end of said stop bar. Said leg, 0', extends belowthe bottom of the car, as-shown in Fig. 1, when the latter occupies an elevated, or partly elevated, withinthe hatchway, but as the car reaches the limit of its. downward movement, leg, O,'is operated to lift the stopbar 0, thus permitting the barrels or casks to be discharged from the car.

The operation is as follows :When the car is raised to the top part of the hatchway, counterweight J isnear the bottom of the hatchway, and said car is held in'a stationary position b the application of the brake mechanism. to bar 0 is lowered across one end of the car, but stop bar, L, is raised, whereby the barrels 0r casks may be rolled upon the bottom, A, of the car, bar 0 preventing the barrels from rolling off the other side of said car. Stop bar L is now lowered, and the brake mechanism is released by opcrating lever arm, I, rocking the shaft I so that the cranks will relax the brakebands.

wound from the winding drums, D, and

cable J is coiled upon the counterweight drum F forthe purpose of raising the coun- The load resting upon the car is greater than the force of the counterweight,

terweight. As the car reaches the bottom of the hatch-way, leg 0 lifts the stop-bar O, and leg A raises the movable member or bottom A to an inclined position, whereby the load is discharged automatically from the car. The car being relieved of the weight of the load, the counterweight J acts through cable J and drum F to coil cable J and impart rotary motion to shaft C for the purpose of coiling cables G upon drums, D, whereby the car is elevated automatically to a position where another load may be deposited thereon.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States is 1.'In an elevator, a car provided with means for discharging a load therefrom whenisa-id car reaches the limit (if its downward moi'ement, means for guiding the car in a substantially vertical path, a shaft, winding drums rotatable with the shaft, cables attached to the car and coiled upon said winding drums, a separate drum rotatable with-the shaft, a cable wound on the separate drum in an opposite direction to that in which the cage suspending cables are wound upon the winding drums, a counterweight attached to the last mentioned cable and operating to automatically lift the car upon the. discharge of a load therefrom, and brake mechanism for controlling the rotation of the shaft and the vertical movement of the cage.

2. In an. elevator, a car provided: with means for discharging a load therefrom when said car reaches its downward movement, guideways in which the car is positioned for movement in a substantially vertical direction, a shaft, a plurality of winding drums on said shaft, cables attached to the *car and separately coiled upon said winding drums, a counterweight operating to automatically elevate the carupon the discharge of a load therefrom, a separate drum on the shaft, a cable attached to the counterweight and wound on the separate drum in an opposite direction to that in which the car suspending cables are wound on said winding drums, brake drums fined to the shaft, brake-bands cooperating wlth said drums, a crank shaft to which the brake-bands are attached, and means-for operating said crank shaft.

3. In an elevator, a car provided wlth a movable bottom, means for lifting the bottom to an inclined position for discharging the-load when the car reaches the limit of its movement in one direction, guides vbetween which the car travels and. by which .5 the car is limited to movement in a vertical direction, a shaft, winding drums on said shaft, cables attached to the car'and coiled in one direction on said drums, a separate drum on the shaft, a counterweight cable coiled on the separate drum in an opposite directionto that in which the cage-suspending cables are coiled on the winding drpms, a counterweight attached to v the counterweight cable andoperating to elevate the car when a load is discharged therefrom, and means for controlling the vertical movement of the car.

4;. In, an elevator, a car provided with a pivoted bottom, a leg depending from said pivoted bottom for moving'the vlatter to an inclined position upon the descent of the car,- a retaining bar pivotally mounted on said car to normally-close the exit therefrom, and a leg depending from said re-.

taining bar, whereby when the ear reaches the limit of i-ts; downward movement said retaining bar Wllhbfl withdrawn from the path of the loadfand said pivoted bottom will be elevated"todischarge the load from the car through'the exit controlled by said retaining bar. v

5. A car provided with means for discharging a load therefr0m, guide-mecha nism for restricting the movement of the car to a vertical "path, a counterweight for j bottom, means for raising the bottom to taining bar to remove it from the path of said car, said bar retaining means being acan inclined position as the car travels downwardly, whereby a load is adapted to be discharged from the car, a retaining bar positioned on saidcar and in the path of the load, and means for operating the rethe load as the latter is discharged from tuated by the movement of the car. I

In testimony whereof, I have hereunto signed my name in the presence of tWo subscribing witnesses.

JOHN T, CLARK.

Witnesses:

WESTMINSTER ABBEY, EDGAR E. LE BLANC. 

